![]() You can use ammonia solution instead of sodium hydroxide solution, but there are different results for aluminium and copper(II) salts when you use excess ammonia. The solid compound may remain suspended in. Solid can also form due to a change in temperature or any other environmental change that affects the solubility of the compound. In chemistry, the solid usually forms due to a precipitation reaction taking place. Solutions containing copper(II) ions form a blue precipitate when mixed with sodium hydroxide solution. The definition of precipitate is a solid that precipitates (comes out of) solution. 2015 Precipitation reactions (video) Khan Academy Chemistry library Unit 5. Solutions containing copper(II) ions form a blue precipitate when mixed with sodium hydroxide solution In chemistry, a precipitation reaction is a chemical reaction between two.
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